85668049979221 has 16 divisors (see below), whose sum is σ = 87536679056640. Its totient is φ = 83801339415360.

The previous prime is 85668049979203. The next prime is 85668049979233. The reversal of 85668049979221 is 12297994086658.

It is a cyclic number.

It is not a de Polignac number, because 85668049979221 - 2⁵ = 85668049979189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85668049979321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2085527335 + ... + 2085568411.

It is an arithmetic number, because the mean of its divisors is an integer number (5471042441040).

Almost surely, 2^{85668049979221} is an apocalyptic number.

It is an amenable number.

85668049979221 is a deficient number, since it is larger than the sum of its proper divisors (1868629077419).

85668049979221 is a wasteful number, since it uses less digits than its factorization.

85668049979221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63324.

The product of its (nonzero) digits is 940584960, while the sum is 76.

The spelling of 85668049979221 in words is "eighty-five trillion, six hundred sixty-eight billion, forty-nine million, nine hundred seventy-nine thousand, two hundred twenty-one".